That’s a large chunk of the staff. Clearwire employed 1,053 people at the end of September 2012, including about 400 in the Seattle area. It was unclear how many people worked at Clearwire in July, at the time of the Sprint deal.

Just this week, Sprint reported earnings that surprised Wall Street, with the company adding 58,000 new subscribers. Analysts had projected that the company would lose customers. Sprint is still losing money, reporting $1 billion loss for the fourth quarter.

We’ve reached out to Sprint for comment about the layoffs, and we’ll update this post as we hear more.

John Cook is GeekWire's co-founder and editor, a veteran reporter and the longest-serving journalist on the Pacific Northwest tech startup beat. Follow him @johnhcook and email john@geekwire.com.